AM Science Forum by Fraunhofer Rapid.Tech 3D 2024

Novel Voronoi-based Scanning Strategies Combined with Field-driven Geometry Analysis

FRAUNHOFER IWU will present a new scanning strategy with which the size of partial exposure areas can be adapted to the component geometry and energy input requirements.

This talk presents an approach for a software-based process chain in Laser Powder Bed Fusion (LPBF). Based on a comprehensive geometry analysis of the part to be manufactured, relevant control parameters are calculated and used as decision criteria for subsequent process steps in the process data generation for adaptive design of key parameters. These include parameters of the scanning strategy such as the hatch pattern and specific sub-parameters (e.g., hatching pattern sub-area sizes, azimuthal alignment of exposure vectors, hatch spacing). The goals are to improve the manufacturability of overhang surfaces while minimizing the use of supports and to enable more homogeneous thermal conditions throughout the fabrication process. The article shows examples of individual components of this software process chain. In addition, this approach is coupled with a Voronoi-based scanning strategy to allow greater design freedom in the geometric design of the hatching. Finally, experimental studies based on this software process chain are presented.

Presentation language: ENG

Speakers (1)

Thomas Töppel

Thomas Töppel

Deputy Head of LPBF Department